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Millions told to stay indoors as eye-burning toxins fill the air in 16 US states today

Millions of Americans across 16 US states are being urged to stay indoors if possible as toxic air sweeps a large swath of ...
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3 states ordered indoors after urgent 'unhealthy for all' air warning

Americans in three states have been told to stay indoors today as air quality plunges into “unhealthy for all” territory, triggering rare emergency alerts. Officials warn that microscopic particles in ...